Before the scheduled closure, motorists should be alert to single-lane restrictions in the area between 6 p.m. and 6 a.m. as construction crews are preparing the bridge for demolition and replacement.

The existing Conoy Creek bridge was built in 1911 and is considered structurally deficient, PennDOT says. In February PennDOT awarded a $1.13 million contract to Clearwater Construction Inc. of Mercer County to demolish and replace the bridge.

The contractor started work June 11 and is scheduled to finish by the end of August.

The portion of Route 230, known locally as North Market Street, averages more than 14,200 vehicles a day, PennDOT says.

Motorists can check conditions on Route 230 and other state roads at www.511PA.com.